菜鸟教程在线编辑器

AI 编程工具
 
                <!DOCTYPE html>
<html>
<body>

<p>点击按钮以索引为键值的方式循环数组 "cars", 开始的索引值为 2。</p>

<button onclick="myFunction()">点我</button>

<p id="demo"></p>

<script>
function myFunction() {
    var cars = ["BMW", "Volvo", "Saab", "Ford"];
    var i = 2;
    var len = cars.length;
    var text = "";

    for (; i < len; i++) {
        text += cars[i] + "<br>";
    }

    document.getElementById("demo").innerHTML = text;
}
</script>

</body>
</html>

              